I consider a .357 magnum medium frame stainless gun the hiker's perfect companion. light, weather resistant, accurate, powerful, versatile. A Tracker is certainly an option. I'd like a .41 magnum titanium tracker, but they're a mght expensive. I have settled for now on a nickel Taurus M66, most accurate medium frame .357 with both .38 and .357 rounds I've owned. I had a Ruger Security six, a stainless M971 Rossi (really light and pretty accurate), a Smith M19 (blued steel), and the Taurus. I kept the Taurus. A Smith and Wesson M66 (stainless K frame) would be a good choice. I'd shy away from the heavyish L frames and GP100s for back packing. After some miles, you'll know the difference. There's a lot of good used guns out there that would work really well. I gave 200 bucks used for that Taurus and it's a keeper, very accurate, rugged gun and lighter than the L frames and GP100s for hiking.
Those trackers are neat, I just don't do enough hiking anymore to justify one. I kinda think a 24 ounce titanium .41 would also be an awesome IWB carry, though.
You'd better be used to heavy recoil with heavy loads in such a gun, though. I am, been shooting hand cannons for a while. I'd down load that .41 for carry, carry the hot stuff in bear country.
If I thought I needed a .44 like the Mountain Gun, I'd carry my blackhawk in .45 colt with hot 300 grain handloads. It'll do anything the .44 can do and that gun is awesome accurate, too. I love single actions, too, for outdoor work. I have two blackhawks (one in .357) and an Old Army. The Blackhawks are as heavy as a mountain gun, though. The Taurus .357 is noticeably lighter on the hip and ammo packs tighter.